电离层折射误差的多频改正方法及精度分析  

Multi-Frequency Methods and Accuracy Analysis for Correcting Ionospheric Error

作　　者：黄张裕[1] 赵义春[1] 秦滔[1] 

机构地区：[1]河海大学土木工程学院,江苏南京210098

出　　处：《海洋测绘》2010年第2期7-10,共4页Hydrographic Surveying and Charting

摘　　要：基于GPS多频观测值的线性组合处理电离层折射误差的原理和方法,推导了电离层延迟的多频消除组合公式,并估计这些线性组合观测值的观测精度和适用范围,验证了用多频观测值组合改正电离层误差的可行性和有效性。GPS现代化后,充分利用增加的第三个导航频率,用三频组合观测值对电离层折射误差进行改正,可以考虑到高阶电离层延迟效应,更有效地提高GPS定位精度。Based on the principle and methods of the GPS multi-frequency observation liner combination to deal with ionospheric refraction error, this paper presents the combination formula of eliminating the ionospheric effect. By estimating the measurement accuracy and applicability of these liner combination methods, this paper discusses the feasibility and validity about multi-frequency methods. After the GPS modernization, we can make full use of the third additional frequency to correct the ionospheric refraction error with three frequency observation, and take into account the effect of higher-order ionospheric delay to improve more effectively the GPS positioning accuracy.

关 键 词：全球定位系统 电离层误差 多频线性组合 精度分析 

分 类 号：P228.4[天文地球—大地测量学与测量工程]